Publication detail

Prediction of Discharge Coefficient of Internally-Mixed Twin-Fluid Atomizers

JEDELSKÝ, J. JÍCHA, M.

Original Title

Prediction of Discharge Coefficient of Internally-Mixed Twin-Fluid Atomizers

English Title

Prediction of Discharge Coefficient of Internally-Mixed Twin-Fluid Atomizers

Type

conference paper

Language

en

Original Abstract

Flow rate of atomized liquid is one of the nozzle design parameters. Several research works have proposed cor-relations for prediction of the discharge coefficient of twin-fluid atomizers with internal mixing. We have used linear combination of two known physical models for two-phase discharge; the Homogeneous Flow Model and Separated Flow Model which correspond to the extreme cases of gas-liquid discharge without slip and discharge with maximum slip respectively. Corrections to include effects of fluid physical properties and nozzle geometry to the discharge were added and resulting model has been compared with experimental data for a set of single-hole effervescent atomizers under wide range of inlet gauge pressures and gas to liquid mass flow ratios. Good match with correlation coefficient R2 = 0.95 was found between the model based and the experimentally found discharge coefficients. A free-access web application was compiled to serve as a design tool for engineers.

English abstract

Flow rate of atomized liquid is one of the nozzle design parameters. Several research works have proposed cor-relations for prediction of the discharge coefficient of twin-fluid atomizers with internal mixing. We have used linear combination of two known physical models for two-phase discharge; the Homogeneous Flow Model and Separated Flow Model which correspond to the extreme cases of gas-liquid discharge without slip and discharge with maximum slip respectively. Corrections to include effects of fluid physical properties and nozzle geometry to the discharge were added and resulting model has been compared with experimental data for a set of single-hole effervescent atomizers under wide range of inlet gauge pressures and gas to liquid mass flow ratios. Good match with correlation coefficient R2 = 0.95 was found between the model based and the experimentally found discharge coefficients. A free-access web application was compiled to serve as a design tool for engineers.

Keywords

Twin-fluid atomizers, Discharge Coefficient, two-phase flow

RIV year

2011

Released

05.09.2011

Publisher

Instituto superior Tecnico

Location

Lisbon, Portugal

ISBN

978-989-20-2410-3

Book

24 Annual Conference on Liquid Atomization and Spray Systems, proceedings

Edition

1

Pages from

1

Pages to

4

Pages count

4

BibTex


@inproceedings{BUT73227,
  author="Jan {Jedelský} and Miroslav {Jícha}",
  title="Prediction of Discharge Coefficient of Internally-Mixed Twin-Fluid Atomizers",
  annote="Flow rate of atomized liquid is one of the nozzle design parameters. Several research works have proposed cor-relations for prediction of the discharge coefficient of twin-fluid atomizers with internal mixing. We have used linear combination of two known physical models for two-phase discharge; the Homogeneous Flow Model and Separated Flow Model which correspond to the extreme cases of gas-liquid discharge without slip and discharge with maximum slip respectively. Corrections to include effects of fluid physical properties and nozzle geometry to the discharge were added and resulting model has been compared with experimental data for a set of single-hole effervescent atomizers under wide range of inlet gauge pressures and gas to liquid mass flow ratios. Good match with correlation coefficient R2 = 0.95 was found between the model based and the experimentally found discharge coefficients. A free-access web application was compiled to serve as a design tool for engineers.",
  address="Instituto superior Tecnico",
  booktitle="24 Annual Conference on Liquid Atomization and Spray Systems, proceedings",
  chapter="73227",
  edition="1",
  howpublished="online",
  institution="Instituto superior Tecnico",
  year="2011",
  month="september",
  pages="1--4",
  publisher="Instituto superior Tecnico",
  type="conference paper"
}